A friend of mine asked me to do an inspiration board. She was looking for a kid's room using great, vibrant blue and green colors. Being that blue and green are my favorite two colors, I thought I could whip something up for her quickly.
For this scheme - I would start with a blue wall. Either a bold blue for the whole room, or an accent of a bold blue wall behind the bed. Trim could be natural wood or white, keep the floor neutral with carpeting or hard wood floors (warm hard wood floors would look great here).
The bright colors keep this theme fresh & fun. You could do just about any window treatment in this room - grommeted floor length curtains over a rattan shade would probably be my preference.
One big requirement for every child's room is storage. I tried to take that into consideration with this board. You will see a large dresser, two end tables, a rattan storage bin for the end of the bed, as well as a 9-cube bookshelf. Toss in a few blue and green bins to keep up with the theme. You could add a dark wood desk & bright green desk chair, a tall dresser with fun mirror & even a great set of wall shelves for extra storage.
This room tends to lean toward a teen's style, more than a child, but a few changes could make the room more child-like. You could decorate the nightstands with less modern lamps & a fun clock. A bedspread that was a little less mature or even just a simpler pattern (like green and white stripes) could make this more fun for a toddler, but I think this is a very sophisticated kids room here. The bedspread above could lend itself a little to the feminine side the way it is shown, but if you take off the bed skirt & the accent pillows, and use lime green sheets, I feel that it would be totally gender neutral.